<tr>
    <td></td>
    <td></td>
    <td><input type="text" id="CodigosSelec" name="CodigosSelec" size="50" value="probar" style='visibility:hidden'/></td>
</tr>
<tr>
    <td colspan="3">
        <div id="dv_txt_contenido"></div>
    </td>
</tr>